Torque controller for internal combustion engine

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(11)

EP 0 924 420 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	13.09.2000 Bulletin 2000/37

(43)	Date of publication A2:
	23.06.1999 Bulletin 1999/25

(21)	Application number: 98123769.6

(22)	Date of filing: 14.12.1998

(51)	International Patent Classification (IPC)⁷: F02D 41/30, F02D 41/38, F02D 43/00

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

15.12.1997 JP 34514497

(71)	Applicant: NISSAN MOTOR CO., LTD.
	Yokohama-shi Kanagawa-ken (JP)

(72)	Inventors:
	Kazama, Isamu Yokosuka-shi, Kanagawa-ken (JP) Iwano, Hiroshi Yokosuka-shi, Kanagawa-ken (JP) Yasuoka, Masayuki Yokohama-shi, Kanagawa-ken (JP)

(74)	Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät
	Maximilianstrasse 58 80538 München 80538 München (DE)

(54)	Torque controller for internal combustion engine

(57) A torque controller for a direct-injection type internal combustion engine achieves the target engine torque accurately, without being affected by the combustion mode. The combustion efficiency is different depending on whether an engine combustion mode is in a homogeneous combustion mode or a stratified combustion mode. The torque controller calculates an eventual target intake air flow rate TTP2 based on the target intake air flow rate TTPO, the target air/fuel ratio tDML, and the combustion efficiency correction rate ITAF, which is calculated based on the combustion mode.

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